ASCP urinalysis and body fluids
The clarity of a urine sample should be determined following thorough mixing of the
specimen
Milky urine from a 24 year old woman would most likely contain many white blood cells
A brown-black urine would most likely contain: melanin
The yellow color of urine is primarily due to urochrome pigment
Red urine may be due to: myoglobin
A urine specimen collected on an apparently healthy 25-year-old man shortly after he finished
eating lunch was cloudy but showed normal results on multiple reagent test strip analysis. The
most likely cause of this turbidity is Phosphates
In what metabolic disease will urine turn dark brown to black upon standing Alkaptonuria
, ASCP urinalysis and body fluids
Urine osmolality is related to: specific gravity
Urine Specific Gravity is an index of the ability of the kidney to concentrate urine
Osmolality is a measure of dissolved particles, including ions
A patient urine sample has an increased protein and a high specific gravity. Which of the
following would be a more accurate measure of urine concentration osmolality
To prepare a solution appropriate for quality control of the refractometer the laboratory should
use Sodium chloride with a specific gravity 1.022
A urine's specific gravity is directly proportional to its: dissolved solids
Isosthenuria is associated with a specific gravity which is usually fixed around 1.010
the fluid leaving the glomerulus has a specific gravity of 1.010 (pH of 7.4)
, ASCP urinalysis and body fluids
A deficiency in arginine vasopressin (antidiuretic hormone) is associated with Low urine
specific gravity
When using a refractometer to measure urine concentration, the laboratory must correct for what
in their calculations Glucose
Calibration of refractometers is performed by measuring the specific gravity of distilled water
and Sodium chloride
The method of choice for performing a specific gravity measurement of urine following
administration of x-ray contrast dye is Reagent test strip
What urinary parameter is measured during the course of concentration and dilution tests to
assess renal tubular function Osmolality and specific gravity
Refractive index is a comparison of light velocity in air to light velocity in solutions
A patient has 2 separate urinalysis reports, which contain the following data
, ASCP urinalysis and body fluids
specific gravity A 1.004; B 1.017
pH A 5.5; B 7.0
protein A negative; B 1+
glucose A negative; B negative
blood A negative; B small
microscopy A rare epis; B 1-2 granular casts, 2-3 hyaline casts, moderate epis
Which of the following statements best explains these results a (protein, glucose and
microscopy of A are false negatives because of the specific gravity)
After receiving a 24-hour urine for quantitative total protein analysis, the laboratory must first
Measure the total volume
A falsely low result for urobilinogen May occur if the urine specimen is Exposed to light
What urine result is most likely to be affected by prolonged exposure to light Bilirubin
The following test results were obtained on a urine specimen at 8:00am
The clarity of a urine sample should be determined following thorough mixing of the
specimen
Milky urine from a 24 year old woman would most likely contain many white blood cells
A brown-black urine would most likely contain: melanin
The yellow color of urine is primarily due to urochrome pigment
Red urine may be due to: myoglobin
A urine specimen collected on an apparently healthy 25-year-old man shortly after he finished
eating lunch was cloudy but showed normal results on multiple reagent test strip analysis. The
most likely cause of this turbidity is Phosphates
In what metabolic disease will urine turn dark brown to black upon standing Alkaptonuria
, ASCP urinalysis and body fluids
Urine osmolality is related to: specific gravity
Urine Specific Gravity is an index of the ability of the kidney to concentrate urine
Osmolality is a measure of dissolved particles, including ions
A patient urine sample has an increased protein and a high specific gravity. Which of the
following would be a more accurate measure of urine concentration osmolality
To prepare a solution appropriate for quality control of the refractometer the laboratory should
use Sodium chloride with a specific gravity 1.022
A urine's specific gravity is directly proportional to its: dissolved solids
Isosthenuria is associated with a specific gravity which is usually fixed around 1.010
the fluid leaving the glomerulus has a specific gravity of 1.010 (pH of 7.4)
, ASCP urinalysis and body fluids
A deficiency in arginine vasopressin (antidiuretic hormone) is associated with Low urine
specific gravity
When using a refractometer to measure urine concentration, the laboratory must correct for what
in their calculations Glucose
Calibration of refractometers is performed by measuring the specific gravity of distilled water
and Sodium chloride
The method of choice for performing a specific gravity measurement of urine following
administration of x-ray contrast dye is Reagent test strip
What urinary parameter is measured during the course of concentration and dilution tests to
assess renal tubular function Osmolality and specific gravity
Refractive index is a comparison of light velocity in air to light velocity in solutions
A patient has 2 separate urinalysis reports, which contain the following data
, ASCP urinalysis and body fluids
specific gravity A 1.004; B 1.017
pH A 5.5; B 7.0
protein A negative; B 1+
glucose A negative; B negative
blood A negative; B small
microscopy A rare epis; B 1-2 granular casts, 2-3 hyaline casts, moderate epis
Which of the following statements best explains these results a (protein, glucose and
microscopy of A are false negatives because of the specific gravity)
After receiving a 24-hour urine for quantitative total protein analysis, the laboratory must first
Measure the total volume
A falsely low result for urobilinogen May occur if the urine specimen is Exposed to light
What urine result is most likely to be affected by prolonged exposure to light Bilirubin
The following test results were obtained on a urine specimen at 8:00am
